Island



. (No Model.)

D. W. BROWN.

' SHUTTLE FOR SEWING MACHINES.

No. 561,088. Patented June 2, 1896 AN DREW BJSRAHAM FKOTOUTHQWASHINGTUN.Di:v

UNITED STATES PATENT OFFICE.

DANIEL \V. BROWN, OF PROVIDENCE, RHODE ISLAND, ASSIGNOR TO THE HOUSEHOLDSEIVING MACHINE COMPANY, OF SAME PLACE.

SHUTTLE FOR SEWING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 561,088, dated June 2,1896.

Application filed December 22, 1893. Serial No. 494,389. (No model.)

To all whom it may concern:

Be it known that I, DANIEL WV. BROWN, of the city and county ofProvidence, in the State of Rhode Island, have invented certain new anduseful Improvements in Sewing-Machine Shuttles; and I do hereby declarethe following specification, taken in connection with. the accompanyingdrawings, forming a part of the same, to be a full, clear, and exactdescription thereof.

The object of the invention is to improve the tension upon theshuttle-thread and to secure a tension which shall be certain to beyielding or elastic; and to that end the invention consists in thecombinations and arran gements of parts hereinafter described.

Referring to the drawings, Figure l is a plan view of a shuttle with myimprovements applied thereto. Fig. 2 is a like View of a shuttle-body.Fig. 3 is a longitudinal section of a shuttle on the line m 0;, Fig. 1.Fig. 4. is a corresponding view to Fig. 3, but showing the bobbin inplace and the shuttle threaded. Fig. 5 is an edge View, and Fig. (3 atop View, of the shuttle-spring.

The present improvements are applicable to either an open-ended or aclosed-end shuttle, only an open-ended shuttle, however, being shown inthe drawings.

A represents the shuttle-body of usual form, and B the bobbin containedtherein. The shuttle-body is provided with an angular slot at for thepassage of the thread in threading the shuttle, said slot extending fromthe heel of the body to about midway the length of the bobbin-chamberand there terminating in a circular enlargement a, as shown in Fig. 2.Said shuttle-body is also provided with a hole 1) near the heel thereof,and with a countersunk recess Z) toward the point for the attachment ofthe shuttle-spring C. This shuttle-spring is attached to theshuttle-body in the usual manner, and for the purpose of such attachmentis provided at one end with an offset 0, adapted to enter the hole a andengage the shuttle-body, and at the other end with an offset 0, adaptedto enter the recess b in the shuttle-body, where it is held by a screw 0t The shuttlespring is provided with a curved portion or extension d,commonly called the sword, and with a V-shaped slot e, forming betweenthe legs of said slot a point e, the ends of said slot terminating incircular enlargements, as shown in Figs. 1 and 6, such construction, inconnection with the open-ended slot a, serving to form a selfthreadingshuttle.

It will be observed that the sword d is curved and projects for aconsiderable distance from the main portion of the shuttlespring. As aresult of this construction it has been found that the sword acts as abrace and serves to destroy to a large degree the elasticity or yield ofthe shuttle-spring, resulting in a stiff unyielding tension upon theshuttle-thread, which is very undesirable. To remedy this difficulty, Ihave provided a freeended spring-tongue of such construction andarrangement that it will always secure a yielding or elastic tension,even when the shuttle-sprin g is provided with the projecting sword.This spring-tongue I prefer to form integral with the shuttle-spring,although this is not necessary, and in the drawings I have shown saidspring-tongue g as formed by cutting a three-sided slot f in theshuttle-spring C, as clearly shown in Figs. 1 and 6. This sprin -tongueg is formed so that it will overlie the hole a in the shuttle-body, andwith its free end projecting for some distance in front of said hole andoverlying the shuttlebody.

Preferably the free end of the tongue g is depressed to a greater orless degree to increase the tension, as shown somewhat exaggerated inFigs. 3 and 5. Preferably also there is formed in that portion of theshuttlespring 0 which lies just in front of the free end of the tongue 9an offset h, as shown in the drawings.

When the bobbin is in place and the shuttle threaded, the thread 2'leads from the bobbin up through the hole a, at the end of the slot at,thence forward in the direction of the length of the tongue g andbetween said tongue and the body of the shuttle, thence under the offset71., up through the enlargement at one end of the V-shaped slot e, overthe point e, down through the enlargement at the other end of the slote, and out between the shuttle-spring C and the shuttlebody, all asshown in Figs. 1 and 4. It will be seen that the thread is thus led forsome little distance between the spring-tongue g and the body of theshuttle, and so that a pressure or tension is produced upon the threadbetween said tongue and shuttle-body and before the thread passes to thethreadguides on the shuttle-spring 0. By reason of this arrangementthere is always a uniform tension on the thread before it passes throughthe guides on the shuttle-spring, and conse quently the thread will bedrawn through said guides smoothly and under a uniform tension. It willfurther be seen that this ten sion is always a yielding or elastictension and is in no way affected by the presence of the sword. Thetension produced by said spring-tongue may be regulated or adjusted byturning the screw 0 Vhile I prefer to make the entire bar or strip C ofspring metal and suificiently thin to be of a spring character, and soas to thus increase the spring force of the tongue g, if desired all ofthe bar or strip 0 except the tongue 9 may be stiff and rigid.

I am aware of the patent to Blake, No. 149,565, granted April 14, 1874,and I do not claim what is disclosed therein.

\Vhat I claim as my invention, and desire to secure by Letters Patent,is-

1. The combination, with a shuttle'body having a thread-deliveringaperture, of a bar attached to said body and provided withthread-guides, said bar being also provided with a free-endedspring-tongue to constitute a spring-tension for the shuttle-thread,said tongue being located in the path of the thread between the saidaperture and guides whereby it will bear upon the thread as it comesfrom the shuttle-body and before the thread is threaded through thethread-guides on said bar, substantially as described.

2. The combination, with a shuttle-body having a thread deliveringaperture, of a shuttle-spring attached to said body and provided withthread-guides, said shuttle-spring being also provided with a free-endedspringtongue located in the path of the thread between said aperture andguides whereby it will bear upon the thread as it comes from theshuttle-body, and before the thread is threaded through thethread-guides 011 the shuttle spring, substantially as described.

The combination, with a shuttle-body having a thread deliveringaperture, of a shuttle-spring attached to said body and pro vided withthread-guides, said shuttle-spring being provided with a free endedspringtongue located in the path of the thread between said aperture andguides, and being also provided with an oifset adjacent to the free endof said tongue for the passage of the thread, substantially asdescribed.

, DANIEL XV. BROWN.

\Vitnesses:

W. H. THURSTON, S. .T. lvloarnv.

